We recently reported that many users who received a Kindle Fire as a Christmas or New Year’s gift are barely even using the device. Now, a new study conducted by ChangeWave has found even more interesting facts on Kindle Fire owners.

According to the research company, a survey of 2607 Kindle Fire owners showed that only 54 percent are “very satisfied” with the tablet, compared to a 2011 study done by the same company where 74 percent of iPad owners had a similar response.

So what exactly are Kindle Fire owners unhappy about? ChangeWave has seemingly answered the question with its next set of questions that polled the same users what they dislike most about the Amazon tablet. Apparently, the three most common complaints were the lack of a volume rocker, camera and a shorter than expected battery life. Indeed, even we highlighted these shortcomings of the Kindle Fire in our in-depth review.

It’s not all doom and gloom for Amazon, however, as the data also revealed that Kindle Fire users are more likely to do more shopping on Amazon as compared to users without a Kindle Fire. In fact 29 percent of Kindle Fire owners said they will likely spend more money on Amazon within the next couple of months. This may be a bit unsurprising as it is virtually impossible to avoid using Amazon services on the Kindle Fire, but is nonetheless great news for Amazon in terms of attracting more customers to tangible as well as virtual offerings from the mega-online retailer.